Gene

gene - (genetics) a segment of DNA that is involved in producing a polypeptide chain; it can include regions preceding and following the coding DNA as well as introns between the exons; it is considered a unit of heredity; ...
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gene mapping
the strategies that locate the position of gene loci on chromosomes
Source: Jenkins, John B. 1990. Human Genetics, 2nd Edition. New York: Harper & Row ...
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Gene therapy is the insertion of genes into an individual's cells and tissues to treat a disease, and hereditary diseases in particular. Gene therapy typically aims to supplement a defective mutant allele with a functional one.
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Gene tests (also called DNA-based tests), the newest and most sophisticated of the techniques used to test for genetic disorders, involve direct examination of the DNA molecule itself.
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Gene Therapy I
Many human diseases are caused by defective genes.
A few common examples: DiseaseGenetic defect ...
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Gene families are made up of similar, but not identical, genes. The globin family is the best studied gene family. Hemoglobin consists, in humans, of 2 a-chains and 2 b-chains clustered about a common heme.
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Definition of gene :
A basic unit of hereditary material; an ordered sequence of nucleotide bases that encodes a product (this product could be just RNA like rRNA or finally coding for a protein).
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The movement of a gene fragment from one chromosomal location to another, which often alters or abolishes expression.
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z ...
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Some organisms have evolved mechanisms of gene amplification to provide gene products needed in large quantities. These mechanisms include:
Elaboration of small "extrachromosomal" units that replicate to high copy number (rDNA); ...
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Gene duplication occurs when an error in DNA replication leads to the duplication of a region of DNA containing a (generally functional) gene.
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Gene Regulation Is Necessary
By switching genes off when they are not needed, cells can prevent resources from being wasted. There should be natural selection favoring the ability to switch genes on and off.
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A gene, located in a chromosome region suspected of being involved in a disease, whose protein product suggests that it could be the disease gene in question.
explained:
Listen to a detailed explanation.
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The finding that APOE (the gene encoding apolipoprotein E) polymorphic variation was associated with an altered risk of developing Alzheimer's disease (AD) was a significant advance and immediately prompted a search for the mechanisms responsible for ...
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Gene
The term coined by Johannsen (1909) for the fundamental physical and functional unit of heredity. The word gene was derived from De Vries' term pangen, itself a derivative of the word pangenesis which Darwin (1868) had coined.
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Gene therapy is a more ambitious endeavor: its goal is to treat or cure a disease by providing a normal copy of the individual's mutated gene.
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Gene conversion
An genetic event that produces abnormal segregations by non-reciprocal recombination.
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Gene: An ordered sequence of nucleotides which act as the functional subunit of hereditary information. The collection of genes in an organism determine the characteristics of that organism.
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Gene: The fundamental unit of heredity.
Gene expression: The process by which genes express themselves: in the cell, ge ne expression results in the manufacture of proteins that determine an organism's characteristics.
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gene amplification
The selective synthesis of DNA, which results in multiple copies of a single gene, thereby enhancing expression.
gene cloning ...
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gene banks Storage for seed varieties for future breeding experiments.
gene flow An exchange of genes between two populations of a species, or in extreme cases, between populations of two species (hybridization).
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Gene: A biochemical unit of hereditary, often coding for an entire protein.
Generalist: A pest or natural enemy that can utilize a wide range of species as host or prey.
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gene pool: the collection of genes within a population; as changes in the gene pool occur, a population evolves.
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GENE GUN
Ballistic particle-mediated gene transfer. Complementary DNA molecules are adsorbed to gold particles and shot by a pressure gas jet into tissues or culture cells.
HIGH-PRESSURE FREEZING ...
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Gene duplication is important because it is a way to get new genes. Once a gene has been duplicated one copy can change while the other remains the same.
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Gene expression in
cells
Have a basic knowledge of patterns of gene expression.
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Gene. A locus on a chromosome that encodes a specific protein or several related proteins. It is considered the functional unit of heredity.
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GENE CONVERSION - The alteration of all or part of a gene by a homologous donor DNA that is itself not altered in the process.
GENOME - The complete set of genetic information defining a particular animal, plant, organism or virus.
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gene cloning - isolation and amplification of selected pieces of DNA by recombinant DNA techniques.
genome - complete haploid complement of DNA (including all genes) from the chromosomes of the nucleus of an organism.
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Gene: A unit of DNA which performs one function. Usually, this is equated with the production of one RNA or one protein. A gene contains coding regions, introns, untranslated regions and control regions.
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gene
one of many discrete units of hereditary information located on the chromosomes and consisting of DNA.
germinal disc
A small mass of active protoplasm found directly under the vitelline membrane.
Covered in Lab 14 Gametogenesis and Development ...
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Gene: The fundamental physical and functional unit of heredity (Usually DNA, Some organisms have RNA a gene).
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Gene
: Physical and functional unit of heredity that carries information from one generation to the next. The entire DNA sequence necessary for the synthesis of a functional polypeptide or RNA molecule.
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A map of gene positions on a chromosome. Distances between two genes can be determined by recombination and by genome sequencing project.
Related
Map distance ...
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Reporter gene Gene coding for an easily assayed protein which is used to detect expression of the gene under different conditions; usually to test the activity of a promoter.
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rbcL -- a gene which is located in the chloroplast of photosynthetic organisms. It codes for the large subunit of the protein rubisco, and its sequence has been useful in plant phylogenies.
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For example, the gene for seed shape in pea plants exists in two forms, one form or allele for round seed shape (R) and the other for wrinkled seed shape (r). A heterozygous plant would contain the following alleles for seed shape: (Rr).
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Alternate forms of a gene or DNA sequence, which occur on either of two homologous chromosomes in a diploid organism. (See DNA polymorphism.) Alternative mRNA splicing. The inclusion or exclusion of different exons to form different mRNA transcripts.
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Allele -- an alternative form of a gene; any one of several mutational forms of a gene. Alpha-fetoprotein (AFP) -- a protein excreted by the fetus into the amniotic fluid and from there into the mother's bloodstream through the placenta.
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catabolite gene activator protein (CAP) A specific regulatory protein that controls initiation of transcription of the genes producing the enzymes required for a bacterial cell to use some other nutrient when glucose is lacking.
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Allele: one of two or more different chemical codes possible for a given gene. Offer variation in a given trait.
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Allele
One of the alternative forms of a gene. Most genes in natural populations occur in more than one form.
Biogeography
The study of the geographic distributions of species and the historical explanation of these patterns.
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Mutation a change in a gene
(muta = change)
MyocardialInfarction death of a portion of the heart muscle due to lack of blood supply due to a blocked artery
(myo = muscle; cardio = heart; infarct = filled in stuffed) ...
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All existing organisms on Earth are descended from a common ancestor or ancestral gene pool. This "last universal common ancestor, that is, the most recent common ancestor of all organisms, is believed to have appeared about 3.
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Parapatric speciation. The differentiation into distinct species of populations experiencing some gene flow
Parasite. An organism living on or in, and negatively affecting, another organism ...
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The fourth stage of prophase 1 of meiosis, following the pachytene stage, in which there is continued shortening and thickening of the chromosomes. Final gene transcription is completed, after which diakinesis occurs.
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System Essays in Biochemistry vol 40: The Nuclear Receptor Superfamily Essays in Biochemistry vol 39: Programmed Cell Death Essays in Biochemistry vol 38: Proteases in Biology and Medicine Essays in Biochemistry vol 37: Regulation of Gene Expression ...
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